Hardware and system timing are different Post: 302904614

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Operating Systems Linux Red Hat Hardware and system timing are different Post 302904614 by manjusharma128 on Thursday 5th of June 2014 07:07:36 AM

06-05-2014

Registered User

Hardware and system timing are different

-> We have 2 servers server1 and server2 server.
->server1 is master application and server2 is slave application server. ->output of server1 hardware and slave timing:

Code:

#  hwclock --show Thu 05 Jun 2014 05:34:08 PM SGT  -0.465666 seconds # date Thu Jun  5 17:34:16 SGT 2014 
# cd /etc/sysconfig/ 

# ls -ltr clock* -rw-r--r-- 1 root root 179 Jul  3  2008 clock 

# cat clock 
# The ZONE parameter is only evaluated by system-config-date. # The timezone of the system is defined by the contents of  /etc/localtime. 
ZONE="Asia/Singapore" 
UTC=false 
ARC=false 
*************
#   ->output of server2 server hardware and software info: 

#  hwclock --show Thu 05 Jun 2014 04:02:23 PM SGT  -0.225825 seconds 
# date Thu Jun  5 17:05:05 SGT 2014 
#  hwclock --show Thu 05 Jun 2014 04:13:40 PM SGT  -0.436206 seconds # date Thu Jun  5 17:15:14 SGT 2014
# cd /etc/sysconfig/ 
# cat clock
 # The ZONE parameter is only evaluated by system-config-date.
 # The timezone of the system is defined by the contents of  /etc/localtime. ZONE="Asia/Singapore"
 UTC=false 
ARC=false 

# cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.7 (Tikanga) #   ->There is a change in the hardware and linux system time change.

-> We know how to change the system and hardware timing.
-> Need advice if we want to change the hardware and system timing then what is the procedure and impact on server appllicationa.
->Kindliy assist.

Last edited by Scott; 06-05-2014 at 08:10 AM.. Reason: Please use code tags

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function::ctime

FUNCTION::CTIME(3stap)					      Time utility functions					    FUNCTION::CTIME(3stap)

NAME

       function::ctime - Convert seconds since epoch into human readable date/time string

SYNOPSIS

	   ctime:string(epochsecs:long)

ARGUMENTS

       epochsecs
	   Number of seconds since epoch (as returned by gettimeofday_s)

DESCRIPTION

       Takes an argument of seconds since the epoch as returned by gettimeofday_s. Returns a string of the form

       "Wed Jun 30 21:49:08 1993"

       The string will always be exactly 24 characters. If the time would be unreasonable far in the past (before what can be represented with a
       32 bit offset in seconds from the epoch) an error will occur (which can be avoided with try/catch). If the time would be unreasonable far
       in the future, an error will also occur.

       Note that the epoch (zero) corresponds to

       "Thu Jan 1 00:00:00 1970"

       The earliest full date given by ctime, corresponding to epochsecs -2147483648 is "Fri Dec 13 20:45:52 1901". The latest full date given by
       ctime, corresponding to epochsecs 2147483647 is "Tue Jan 19 03:14:07 2038".

       The abbreviations for the days of the week are 'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', and 'Sat'. The abbreviations for the months are
       'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', and 'Dec'.

       Note that the real C library ctime function puts a newline ('
') character at the end of the string that this function does not. Also note
       that since the kernel has no concept of timezones, the returned time is always in GMT.

SystemTap Tapset Reference					     June 2014						    FUNCTION::CTIME(3stap)